Preheat your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish.

In a large bowl, combine the yellow cake mix, melted butter, and one egg. Mix until a thick dough forms.

Press the dough evenly into the bottom of the prepared baking dish to form the crust.

In another large bowl, beat the softened cream cheese until smooth.

Add the pumpkin purée and mix until fully combined.

Beat in the powdered sugar, eggs, vanilla extract, ground cinnamon, nutmeg, ginger, and salt until the mixture is smooth and creamy.

Pour the pumpkin mixture evenly over the crust in the baking dish.

Bake for 40-50 minutes, or until the edges are set but the center is still slightly gooey.

Remove the cake from the oven and allow it to cool completely before slicing and serving.